The longest non-contrived place name in the United Kingdom which is a single non-hyphenated word is Cottonshopeburnfoot (19 letters) and the longest which is hyphenated is Sutton-under-Whitestonecliffe (29 characters).
At over 180,000 letters long, the chemical name of the protein titin is often said to technically be the longest English word. If spoken out loud, this word takes over three hours to say!
Define longest. longest synonyms, longest pronunciation, longest translation, English dictionary definition of longest. adj. long er , long est 1. a. Extending or traveling a relatively great distance. b. Having relatively great height; tall. c. Having the greater length of...
"Longest." Vocabulary.com Dictionary, Vocabulary.com, https://www.vocabulary.com/dictionary/longest. Accessed 16 Apr. 2026. Copy citation Examples from books and articles
In this article, we will explore the 12 longest words in the world, from different languages and cultures, discovering the beauty and complexity that can exist in a single word.
'longest' also found in these entries (note: many are not synonyms or translations):
Many of the longest words in the dictionary refer to medicine or chemistry. The nature of their work, or science in general, calls for it as it deals with very specific things. They need special words to describe tiny details without leaving anything behind.
Find 73 different ways to say LONGEST, along with antonyms, related words, and example sentences at Thesaurus.com.
What Is the Longest Word In English? Here’s a List of 15 Lengthy Words
Take your vocabulary to the next level with this list, featuring 13 of the longest words in the English language.